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1794 Finsen (1970 GA)
Classification: Main-belt Asteroid          SPK-ID: 2001794
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509892634825154 3.4078e-08  
a 3.131138979815045 1.3073e-08 au
q 2.658370611391377 1.0669e-07 au
i 14.57895413606439 4.3131e-06 deg
node 221.0618351678621 1.319e-05 deg
peri 341.2045530842999 1.8973e-05 deg
M 34.43794972632801 1.2469e-05 deg
tp 2458806.908301140060
(2019-Nov-19.40830114)
7.0468e-05 TDB
period 2023.727084318772
5.54
1.2674e-05
3.47e-08
d
yr
n .1778895992397035 1.1141e-09 deg/d
Q 3.603907348238713 1.5047e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2872  
   data-arc span      25505 days (69.83 yr)  
   first obs. used      1950-10-05  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45089  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:40:54  

Additional Information
 Earth MOID = 1.65824 au 
 Jupiter MOID = 1.39673 au 
 T_jup = 3.146 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457007.5 (2014-Dec-16.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1506670415426875 3.3967e-08  
q 2.659308440717667 1.0623e-07 au
tp 2456779.245051163403
(2014-May-01.74505116)
7.5683e-05 TDB
node 221.0940489393298 1.3189e-05 deg
peri 340.5814731457713 1.9028e-05 deg
i 14.57861074940187 4.3132e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2872  
   data-arc span      25505 days (69.83 yr)  
   first obs. used      1950-10-05  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45089  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:40:54  

Additional Information
 Jupiter MOID = 1.39673 au 
 T_jup = 3.146 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.153758994070266E-15 -3.58867926317476E-15 7.977213331452976E-13 -1.847014452302552E-15 1.503306560233311E-13 -1.80310563129415E-15
q -3.58867926317476E-15 1.128551952255896E-14 -2.870687972993065E-12 -3.865629484276846E-15 -5.290279160980429E-13 4.551947869142588E-15
tp 7.977213331452976E-13 -2.870687972993065E-12 5.727974740750238E-9 1.122537527007157E-11 1.044331337045559E-9 -1.318169654175259E-12
node -1.847014452302552E-15 -3.865629484276846E-15 1.122537527007157E-11 1.739486769805237E-10 -1.67703981189606E-10 1.381024305895669E-11
peri 1.503306560233311E-13 -5.290279160980429E-13 1.044331337045559E-9 -1.67703981189606E-10 3.620698225767562E-10 -1.387600770059571E-11
i -1.80310563129415E-15 4.551947869142588E-15 -1.318169654175259E-12 1.381024305895669E-11 -1.387600770059571E-11 1.860349974477872E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.0   n/a MPO473788 IRAS observations used: 5
diameter diameter 38.050 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.346 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Hills, K. (2016) Minor Planet Bull. 43, 5-6.]
geometric albedo albedo 0.046   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.695   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.97 deg.
U-B UB 0.312   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.97 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1794 Finsen (1970 GA)          Discovered 1970-Apr-07 by Bruwer, J. A. at Hartbeespoort
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1970 GA = 1937 JR = 1948 GK = 1950 TJ = 1950 TS2 = 1951 XL = 1951 YJ = 1962 WX = 1965 MC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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